Silver/silver chloride electrode material, method for manufacturing same and electrode

A technology for silver chloride electrodes and electrode materials, which is applied in the direction of material analysis, analysis materials, and instruments by electromagnetic means, can solve problems such as industrial application limitations, shedding or wear, and unfavorable electrode performance, and achieve good electrochemical performance. , stable and firm adhesion, the effect of large industrialization significance

Active Publication Date: 2013-07-10
SUZHOU GREENTEK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because silver chloride is non-conductive, if its ratio is excessive, the conductivity of the electrode will be affected; on the contrary, if the silver chloride is too small, it will not be able to form a uniformly dispersed silver/silver chloride active interface with silver particles microscopically, and it will Affects its low polarization electrochemical properties
[0004] In the three conventional production methods mentioned above, the electrochemical treatment of silver, usually due to the thin surface chloride layer, the surface active layer falls off or wears off after a period of use , which has a very adverse effect on the performance of the electrode; pressing and sintering the disc electrode usually requir

Method used

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  • Silver/silver chloride electrode material, method for manufacturing same and electrode
  • Silver/silver chloride electrode material, method for manufacturing same and electrode
  • Silver/silver chloride electrode material, method for manufacturing same and electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1 Silver / silver chloride electrode paste material

[0037] Preparation of silver / silver chloride powder: Dissolve 1.2g of AgNO3 (analytically pure) in distilled water to make a silver nitrate aqueous solution with a concentration of 0.02M, and add 10g of Ag powder (average particle size 80μm) into the silver nitrate aqueous solution , stirring to disperse evenly to obtain Ag / AgNO3 dispersion system. Make 0.4g of NaCl (analytical pure) into a 0.1M aqueous solution, and add it into the Ag / AgNO3 dispersion system while stirring. After the reaction is finished, the stirring is stopped, and finally the water layer is poured off, and the reacted product is dried in an oven at a temperature of 80±5°C. In the Ag / AgCl powder prepared in this way, the mass ratio of Ag to AgCl is 1:0.1, and the converted molar ratio is 1:0.07.

[0038] Preparation of binder: Take 0.4g polyvinyl butyral, 0.2g ethyl cellulose, add 2.4g ethyl acetate to dissolve and make binder.

...

Embodiment 2

[0040] Embodiment 2: silver / silver chloride solid electrode

[0041] Get the silver / silver chloride slurry 1 that 0.5g embodiment 1 makes and add in the mould, combine figure 1 shown, hand-molded ( figure 1 Press into a cube) and embed silver wire 2, and then sinter at 150°C for 30 minutes to make a silver / silver chloride electrode sheet. Then the silver wire 2 is welded with the wire 3, and finally the silver / silver chloride electrode piece is encapsulated with epoxy resin 4 to obtain a finished silver / silver chloride solid electrode.

[0042]

Embodiment 3

[0043] Embodiment 3: silver / silver chloride electrode ink-like material

[0044] Preparation of silver / silver chloride powder: prepare Ag and AgCl powders below 100um respectively, weigh 3gAg and 0.3gAgCl, and convert the molar ratio of Ag to AgCl to be 1:0.07.

[0045] Preparation of binder: Take 0.4g polyvinyl butyral, 0.2g ethyl cellulose, add 2.4g ethyl acetate to dissolve and make binder.

[0046] Preparation of diluent: mix 1.3g terpineol, 1.0g ethylene glycol ethyl ether and 0.7g ethylene glycol butyl ether to prepare diluent.

[0047] Mix 3g of the above-mentioned binder, 3g of the above-mentioned diluent and 3g of the above-mentioned silver / silver chloride powder in an agate jar, and ball mill for 10 hours in a ball mill to obtain a uniformly dispersed thin silver / silver chloride ink slurry.

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PUM

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Abstract

The invention discloses a silver/silver chloride electrode material and a method for manufacturing the same. The electrode material comprises, by weight, 15%-70% of silver/silver chloride powder, 1%-15% of adhesion agents and 15%-70% of alcohol and ethers diluents. The method for manufacturing the electrode material includes firstly, manufacturing the silver/silver chloride powder; secondly, adding the adhesion agents and the alcohol and ethers diluents into the silver/silver chloride powder to mix the adhesion agents, the alcohol and ethers diluents with the silver/silver chloride powder to obtain a mixture; and thirdly, mechanically grinding the mixture to obtain slurry with certain consistence for standby application. The silver/silver chloride electrode material and the method have the advantages that the adding proportion of the adhesion agents to the diluents is controlled, so that the inky or pasty silver/silver chloride slurry can be manufactured, has a high-dispersion electrochemical interface and is convenient to process, and a silver/silver chloride electrode which can meet different requirements can be manufactured by a process for coating the slurry on a substrate and molding at low pressure or hand pressure.

Description

technical field [0001] The invention relates to a silver / silver chloride electrode material, a preparation method and an electrode. Background technique [0002] Silver / silver chloride (Ag / AgCl) electrode is a common reference electrode, which has the advantages of high exchange current density, low polarization, low impedance, and constant potential. Because it can accurately detect bioelectrical signals, the Ag / AgCl electrode is a relatively mature bioelectrical recording electrode in practical applications, and has been widely used in EEG, EMG, ECG, etc. Traditional Ag / AgCl electrodes are manufactured by several methods, namely (a) electrochemically treating silver to chlorinate the surface to form a thin layer of silver chloride, (b) pressing silver and silver chloride particles to form Ag / AgCl AgCl disc electrodes, and (c) coating of Ag / AgCl conductive ink on the dielectric substrate. [0003] The excellent electrode performance of silver / silver chloride depends ...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F3/02G01N27/327
Inventor 段晏文李明哲邓雪芳
Owner SUZHOU GREENTEK
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